Anti-pitch system for a motorcycle

DETAILED DESCRIPTION In accordance with the present invention, there is provided an anti-pitch system for a motorcycle having a rear swing arm suspension and a front suspension including a control arm which is hinged to the motorcycle chassis and which extends forwardly therefrom.
The system is particularly adapted to motorcycles having a one-sided front suspension.
The anti-pitch system comprises a torsion rod which is connected at one end to the swing arm of the rear suspension and which is connected at its opposite end to the control arm of the front suspension.
Between the two ends, the torsion rod is rotatably affixed to the underside of the chassis.
The torsion rod effectively links the rear swing arm and the front control arm so that angular displacement of one arm with respect to the chassis is tied to the same displacement of the other arm.
Unequal angular displacements are absorbed and resisted by the torsional rigidity of the torsion rod.
The torsion rod thus resists pitching motions in the motorcycle without resisting substantially vertical motions such as ordinarily occur in response to varying weight loads or in response to dips or rises in a road.
For example, during diving of the motorcycle upon hard braking, the upward motion of the front control arm (relative to the motorcycle chassis) acts through the torsion rod to drive the rear swing arm upwardly also, thereby effectively driving the rear end of the motorcycle chassis downwardly.
Likewise, upward pitching of the motorcycle during hard acceleration is resisted by the torsion rod.
These and other aspects of the present invention will be more apparent upon consideration of the accompanying drawings and the following detailed description of the invention.